Answer
Among polyethylene, polypropylene, poly(vinyl chloride), PET polyester, and polycarbonate, the suitable polymers for the fabrication of a cup to contain hot coffee are polystyrene and polycarbonate. Considering the glass transition temperature on which amorphous polymer begins to soften and taking note that the maximum temperature for a hot coffee is below 100°C, based on Table 15.2, the two said polymers have glass transition temperatures greater than 100°C.
Work Step by Step
Among polyethylene, polypropylene, poly(vinyl chloride), PET polyester, and polycarbonate, the suitable polymers for the fabrication of a cup to contain hot coffee are polystyrene and polycarbonate. Considering the glass transition temperature on which amorphous polymer begins to soften and taking note that the maximum temperature for a hot coffee is below 100°C, based on Table 15.2, the two said polymers have glass transition temperatures greater than 100°C.
